The model looked the picture of happiness as she arrived for the La Mer 'Celebration of an Icon' Global Event hosted by Estée Lauder in Los Angeles on Tuesday (13 October).
Chrissy wore a pretty white gown and silver sandals, and kept her hair slicked back.
Just one day before the event, she announced via Instagram that she and husband John Legend are expecting their first child together.
She told fans: "John and I are so happy to announce that we are pregnant :) As many of you know, we've been trying to have a baby for a while now. It hasn't been easy, but we kept trying because we can't wait to bring our first child into the world and grow our family.
"We're so excited that it's finally happening. Thank you for all your love and well wishes. I look forward to all the belly touching! Xx."
John simply told fans: "We're pregnant!"
John and Chrissy's pregnancy joy comes two years after they wed in Como, Italy.